Has anybody played with multiple identical speaker placement in HT? - diyAudio
Go Back   Home > Forums > Loudspeakers > Multi-Way

Multi-Way Conventional loudspeakers with crossovers

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 8th December 2004, 06:14 PM   #1
diyAudio Member
 
leadbelly's Avatar
 
Join Date: Dec 2002
Location: Calgary, Alberta
Default Has anybody played with multiple identical speaker placement in HT?

I am specifically referring to the usage of more than 1 speaker (not driver) at a given surround location (e.g. 2 rears, 2 left surrounds, etc.). I have 6 identical Mission bookshelf speakers that I have decided to investigate playing around with and was wondering if anybody else had investigated this.

I have read reports from several sources that indicated that 2 rear speakers can be preferable, even if not driven by a dedicated channel (i.e. 2 in parallel/series from a 6.x decoder, optimally 2 individually from a 7.x decoder), so this is something obvious to try.

How about 2 at the surround position? Angled at 45 degrees and wired bipole? Or set back to back and wired dipole? Any work done on this? Any other novel combinations?
__________________
Aerodynamics are for people who can't build engines. Enzo Ferrari
  Reply With Quote
Old 8th December 2004, 06:21 PM   #2
tiroth is offline tiroth  United States
diyAudio Member
 
Join Date: Dec 2001
Location: Pittsburgh, PA, USA
Speak of the devil
Dipole (-ish?) surrounds

What you want sounds distinct from 7.1; 7.1 uses a pair of back rear speakers but does some steering so that this back pair isn't mono. And this pair is completely distinct from the regular surround (side firing) speakers. It sounds to me like your question is not "Should we use more rear speakers" but "Should we use rear speakers with dipole, or dipole-like radiation."
  Reply With Quote
Old 8th December 2004, 06:52 PM   #3
diyAudio Member
 
leadbelly's Avatar
 
Join Date: Dec 2002
Location: Calgary, Alberta
Quote:
Originally posted by tiroth
What you want sounds distinct from 7.1; 7.1 uses a pair of back rear speakers but does some steering so that this back pair isn't mono. And this pair is completely distinct from the regular surround (side firing) speakers. It sounds to me like your question is not "Should we use more rear speakers" but "Should we use rear speakers with dipole, or dipole-like radiation."
No, actually. The 2 rear speakers, in mono, is not something I dreamed up, I have read more than 1 report of that being preferred by some. In fact, it may even by mentioned in my receiver manual, I can't remember.

I am more interested in similar ideas at the surround (side) position, not the rear. Such as the 45 degrees and back-to-back ideas I suggested.
__________________
Aerodynamics are for people who can't build engines. Enzo Ferrari
  Reply With Quote
Old 8th December 2004, 07:48 PM   #4
tiroth is offline tiroth  United States
diyAudio Member
 
Join Date: Dec 2001
Location: Pittsburgh, PA, USA
I didn't mean to imply that it is a new idea, what I meant is that it is the radiation pattern that seems to be of interest to you. The dual surround backs is from the THX spec.

I'm also interested in discussing as I am in the middle of experimenting with this too. What I've read is that dipole tends to be preferable for the sides, and direct firing for the surround back. This makes sense to me, because there doesn't seem to be much point in two surround back dipoles firing into each other out of phase!

(Although, preference for dipoles is not universal. Especially for multichannel music direct radiating or bipole tends to be preferred. This isn't of much interest to me though as I don't listen to multichannel music)

I made some comments in the thread I linked about the ambient feel of listening in the dipole null. At the moment, I preferred placing the speaker slightly behind the listening position (maybe 8-12") so that I am not entirely in the null. Changing this position allows tuning of the degree of ambience vs. HF extension.
  Reply With Quote
Old 9th December 2004, 08:47 PM   #5
diyAudio Member
 
leadbelly's Avatar
 
Join Date: Dec 2002
Location: Calgary, Alberta
Well, I guess it's just me and you interested in this....

I will get around to testing the dual rear speaker idea, but that is easy and the results not easily generalized to other systems since my receiver has proprietary 6.1 decoding and not Dolby or dts 6.1, so what I will find will likely be specific to my system. I don't mind the single rear speaker now, i find it works well with the effects that make heavy use of the rear channel such as gunshots, etc.

Your dipole speaker certainly has the advantage of being suitable for a wide range of placement. Have you varied the delay time at all as you move it around?
__________________
Aerodynamics are for people who can't build engines. Enzo Ferrari
  Reply With Quote
Old 9th December 2004, 09:59 PM   #6
Speakerholic
diyAudio Moderator
 
Cal Weldon's Avatar
 
Join Date: Jan 2004
Location: Near Vancouver
I'm interested also. I am currently working on my HT system. I am building new left, right and center speakers and using my four Polk R15's wired in parallel for the rear (4 ohms). I plan to lay them on their sides, stacked on a shelf with about a 45 degree offset to allow for better tweeter dispersion and still have them in line vertically. I am running an H/K 5.1 system. Or is that 5.2? There are two subwoofer outputs.

How are things in Cowtown leadbelly. Pretty quiet without the Flames I'm guessing.

Cal
__________________
Next stop: Margaritaville
Some of Cal's stuff | Cal Weldon Consulting
  Reply With Quote
Old 9th December 2004, 10:27 PM   #7
diyAudio Member
 
leadbelly's Avatar
 
Join Date: Dec 2002
Location: Calgary, Alberta
Quote:
Originally posted by Cal Weldon
How are things in Cowtown leadbelly. Pretty quiet without the Flames I'm guessing.
Geez don't bring up the Flames. I grew up in Montreal; this is the 2nd time I watch a pro sports lockout/strike just kill the momentum of a Canadian team...

I guess you mean the surrounds? This thread's kinda lazy for mixing up "surround" with "rear" speakers.
__________________
Aerodynamics are for people who can't build engines. Enzo Ferrari
  Reply With Quote
Old 10th December 2004, 04:08 AM   #8
Speakerholic
diyAudio Moderator
 
Cal Weldon's Avatar
 
Join Date: Jan 2004
Location: Near Vancouver
Hi leadbelly,

I must admit I'm not up on the terms but the H/K AVR 40 unit I have calls them rear speakers. The "rear" channels are only 25 wpc as compared with the 55 wpc for the fronts. Does this make them surround or rear? It would be good to know.

Go Canucks. Flames had their chance last year. Lets hope they settle it before it's too late. Oops this is getting off topic.

Cal
__________________
Next stop: Margaritaville
Some of Cal's stuff | Cal Weldon Consulting
  Reply With Quote
Old 10th December 2004, 02:57 PM   #9
Kittle is offline Kittle  United States
diyAudio Member
 
Join Date: Jun 2004
Location: KC
Not sure how this pertains to what your trying to do.. but..

my HT setup has 4 identical speakers (all 3-way floorstanders) for front and rear channels.
I set things up that way to give the greatest versatility between music and HT. It also makes up for having the rear or surrounds a good distance away.
And best of all -- it sounds great.
  Reply With Quote
Old 13th December 2004, 01:28 PM   #10
tiroth is offline tiroth  United States
diyAudio Member
 
Join Date: Dec 2001
Location: Pittsburgh, PA, USA
Another thread in which no one agrees.

http://audiocircle.com/circles/viewt...er=asc&start=0
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Why speaker become sounding compressed, when played too loud? darw82 Multi-Way 18 24th September 2007 05:55 AM
Speaker Placement azira Multi-Way 4 30th December 2005 02:32 PM
speaker placement The_Hi_End Multi-Way 3 4th August 2004 06:55 PM
multiple port placement.... ChesterFuzzin' Multi-Way 1 17th May 2002 06:08 AM


New To Site? Need Help?

All times are GMT. The time now is 10:15 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2